Automatic air-pump.



I. A. KEN-WORTHY. AUTOMATIC AIR PUMP.

APPLIOATIOH FILED AUG.5, 1909.

Patented Aug. 16, 1910.

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JAMES A. KENWORTHY, OF OAKLAND, CALIFORNIA.

AUTOMATIC AIR-PUMP.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application filed August 5, 1909. Serial No. 511,367.

To all whom it may concern:

Be it known that I, James A. Kmvwomnr, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented new and useful Improvements in Automatic Air- Pumps, ofwhich the following is a specification.

The present invention relates to an improved apparatus for pumping airto force it through oil in carbureting apparatus such as that shown inmy United States Patent, granted August 31, 1909, No. 932,871, theobject of the invention being to provide an apparatus of this characterwhich will be compact in form, simple in construction, efficient inoperation, and which will not readily get out of order.

In the accompanying drawing, Figure 1 is a vertical section of myimproved air pump, certain parts being shown in side elevation; Fig. 2is a cross section on the line 22 of Fig. 1; Fig. 3 is a broken verticalsection showing certain parts in the position when the receiver is heldup.

Referring to the drawing, 1 indicates a cylindrical tank, within whichis a cylindrical wall 2, spaced from the wall of the tank to form anannular space 3 adapted to be filled with water or other liquid to forma seal. Depending into said annular space 3 is a cylindrical wall. 1 ofan inverted air receiver or hell 5. In the top 6 of said receiver issecured a casing 7 of a check valve 8, controlled by a light spring 9,said check valve being adapted to open when the receiver is ascending,to admit air into the receiver, and to close when the receiver isdescending, to prevent the escape of air therethrough. When the receiverso descends, it forces the air through a pipe 10 to a carbureter, notshown, in the manner illustrated by the patent above refered to.

In order to produce the vertical reciproca tion necessary to take in airthrough the check valve 8 when ascending, and to force it out to thepipe 10 when descending, there is secured to the top of said receiver anactuating rod 11, said rod being threaded at the top and provided with ahead 12, said threaded end screwing into a threaded sleeve 13, which isitself screwed into a short tube 14 secured in the top of the receiver.On said rod are secured upper and lower stops 15 and 16, and, as thereceiver descends, the upper stop 15 is adapted to contact with a sleeve17, loose upon the rod, and to depress said sleeve with said stop. Tosaid sleeve pivoted a link 18, the lower end of which is pivotallyconnected with an L-shaped lever 19, the lower end of which is pivotedon the lower portion of a lifting cylinder 20. Said cylinder issupported on, and connected with, a T-piece 21, connected by tubes 22and 23 and elbows 24 and 25 with valve casings 26 and 27, which areconnected by oppositely directed passages with vertical inlet and outletpipes 28 and 29, which pass through, and are secured upon, the bottom ofthe tank 1. The continued descent of said bell 5 and of the rod 11 andupper stop 15 thus imparts an angular movement to said lever 19. Uponsaid lever are secured two studs or pins, 31, 32, and between themextends a rod or bar 33, pivoted upon the same pivot as the lever 19,and moving between guide rods 3e secured upon a side of the cylinder 20.Said bar 33 is extended below its pivot and passes between two pins, 35and 36, on a horizontal link 37 outside the valve casings 26 and 27connected by rods 38 and 39 in alinement with each other, withoppositely directed inlet and outlet valves 40 and Q1, respectively, inthe valve casings 26 and 27. When the parts are in the position shown inFig. 1, the link is in its position on the right, the inlet valve isclosed, and the outlet valve is open. The upper end of the rod 33carries an overbalance weight 42. When the angular lever 19 swings, forthe reason above stated, one of said studs 31 engages said bar 33 andadvances it with said lever to a ver tical position, from which it dropson account of the weight 42 to a position on the other side of theVertical, thereby causing the lower end of said rod 33, below itsfulcrum, to move away from the pin 35 and to impinge against the pin 36and move the link 37 of the two valves to the left from the positionshown in Fig. 1, closing the outlet valve and opening the inlet valve.Immediately thereupon, the inlet valve being opened, water under city orother pressure flows up through the pipe 28 through the valve casing 26,elbow 2 1, pipe 22, T-piece 21, into the lifting cylinder 20. In saidlifting cylinder is a piston 45 having a piston rod 46 extending throughthe top of said cylinder, the top of said rod being adapted to contactwith the top of the receiver. An aperture 17 is formed in the top of thecylinder to allow the air to pass freely into and tuates the piston 45to raise the receiver.

. formed .gages said hook and Secured upon the sides of the tank are twoguide rods 50, connected at the top by two cross-rods 51, and securedupon the sides of the receiver, near the top, are guide brackets 52through which said rods pass, and whereby said receiver is guided uponsaid rods.

Pivoted on the top of the receiver is a hook 53 adapted to be pulled inthe direction of its point by a spring 54. Said hook is with an obliqueupper edge 55, which is adapted to be engaged by a roller 56 on theupper part of a yoke 49 secured on a transverse shaft 57, pivoted in thecross rods 51. Secured to said shaft is a long lever 58, the short armof which is guided on a vertical guide 59, and has a counter-weight 60which tends to raise the long arm of the lever. However, so long as airis needed in the carbureter, or other place to be supplied by the pipe10, said lever 58 is depressed, which causes the roller 56 to engage thehook 53 each time that the receiver rises and maintain it out of action,so that the above vertical reciprocation of the receiver continues topump air through the pipe 10, when said carbureter or other container isfilled, so that the lever 58 can rise, it does so on account of theweight 60. On said shaft 57 is also mounted a roller 61, which, when thereceiver rises and the hook 53 is no longer maintained inoperative, en-

holds the receiver in its raised position, arrestin the operation of thepump. When more alr is needed, the lever 58 drops, withdrawing the hook53.

I claim 1. An automatic air pump com-prising an inverted air receiver, atank for said receiver having a water seal therefor, a vertical cylinderwithin the tank, a piston in said cylinder, means whereby the upwardmotion of the piston raises the receiver and the downward motion of thereceiver depresses the piston, inlet and outlet pipes for said cylinder,valve casings connected to said pipes, pipes leading to the cylinder andhaving oppositely directed connections with said valve casings,oppositely disposed valves for closing the respective connections withsaid pipes, valve rods in line with each other and connected to saidvalves, a link connecting said rods outside of said valve casings, pinson said link, a lever extending between said pins and arranged toreciprocate said link, an over-balance weight on said lever for shiftingthe same, a vertical rod carried by the receiver, and an operativeconnection between said rod and lever whereby the reciprocating movementof the receiver produces an oscillating movement in said lever,substantially as described.

2. An air pump comprising an inverted bell-shaped air receiver a tankhaving a seal therefor, guide rods for said receiver secured on saidtank, a cross rod joining the tops of said guide rods, a pivoted hook onthe top of the receiver, a device carried by said cross rod adapted toengage said hook and sustain said receiver in its raised position, aspring arranged to move said hook forward to engage said device, and alever having a counterbalance weight, and having a part arranged by themovement of the lever to disengage said hook from said device,substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JAMES A. KEN WORTHY.

Witnesses:

FRANoIs M. WRIGHT, D. B. RICHARDS.

